| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a parallel bus system which can extend a peripheral device and to easily expand the peripheral device which is designed to match the parallel bus system. SOLUTION: This system is equipped with one CPU 21, one or more kinds of peripheral devices 22, 23, and 24, and a parallel bus 20 which connects the CPU 21 and peripheral devices 22, 23, and 24. One line of the parallel bus 20 is used as a peripheral device selection line, another line is used as a system clock line, and other line are used as lines needed for one byte of the system; and information sent through other lines consists of command-byte, address-byte, and data-byte formats.</p> |
